Prostate Cancer prostate massage pics, prostate massage pictures, prostate massage photos What Is Prostate Cancer? The prostate is a gland in the male reproductive system that produces the majority of seminal fluid that carries sperm. The walnut-sized gland is located beneath a man’s bladder and surrounds the upper part of the urethra, the tube that carries urine from the bladder. Prostate function is regulated by testosterone, a male sex …